#!/usr/bin/env python3
# -*- coding: utf-8 -*-

'''
习题3：生成字符串a1b2c3d4e5f6g7h8i9j10
习题4：生成字符串a1B2c3D4e5F6g7H8i9J10
'''

def ascii_output_3():
    s=""
    for i in range(97,107):
        s+=chr(i)+str(i-96)
    return s

def ascii_output_4():
    s=''
    for i in range(97,107):
        if i%2==0:
            s+=chr(i-32)
            s+=str(i-96)
        else:
           s+=chr(i)
           s+=str(i-96)
    return s

if __name__ == '__main__':
    print("生成字符串a1b2c3d4e5f6g7h8i9j10\n %s" % ascii_output_3())
    print("生成字符串a1B2c3D4e5F6g7H8i9J10\n %s" % ascii_output_4())







